CNBC said customers from NY to California reported outages.
Several Boise customers told the Statesman Friday morning that their service has been restored, including an employee of the Idaho Department of Labor. A spokesman for Louisiana-based CenturyLink said he could not offer more than the information posted on Twitter at this point.
CenturyLink says engineers have identified a problem that left customers across the country without internet service and expected to restore it within hours.
If you've ever been in a serious emergency before, you probably already know how important it is to have quick access to emergency services.
The Cochise County Sheriff's Office said Thursday its 911 centers were experiencing intermittent phone service disruption and, according to ABC15, was redirecting all 911 and administration lines to the Douglas Police Department.
Police departments in Cleburne, Corsicana, Frisco, McKinney and Stephenville also reported 911 outages persisting through Friday morning.
Residents in Clark County, Washington were not alerted of widespread 911 outages through a wireless emergency alert system until nearly three hours after the county's emergency services agency appeared to have first acknowledged its 911 center phone lines were compromised.
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The U.S. Federal Communications Commission (FCC) is investigating a nationwide CenturyLink Inc network outage that has affected service on 911 emergency phone calls across the country, agency chairman Ajit Pai said on Friday.
Callers received a fast busy signal during the outage.
"Its breadth and duration are particularly troubling", he said.
CenturyLink calls itself "the second largest USA communications provider to global enterprise customers".
Parts of Missouri, Idaho and Arizona also experienced 911 outages.